What is CVE-2026-53577?

CVE-2026-53577 is a medium-severity vulnerability in Kestra-io Kestra, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-06-26.

How severe is CVE-2026-53577?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Kestra-io Kestra

CVE-2026-53577

Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the previewFileFromExecution endpoint (GET /api/v1/{tenant}/executions/{executionId}/file/preview) contains an access control bypass that allows any…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Kestra-io Kestra — versions < 1.0.45, >= 1.1.0, < 1.3.21

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-53577?: CVE-2026-53577 is a medium-severity vulnerability in Kestra-io Kestra, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-06-26.
How severe is CVE-2026-53577?: Medium severity. CVSS v3 base score is 6.5 out of 10.